Various schemes of state involvement in investment processes according to the stages of the project, the composition of domestic and foreign participants, the state share of funding are considered. Based on the schematic analytical model of investment projects of cash flows the corresponding financial results and effects for each of the participants and the economic impact to the state are shown. So, besides the financial effect of the participants which determines their participation in the project, in all cases, the state receives direct socio-economic results in the form of tax revenues. Indirectly, as a result there have been considered the wages with benefits and costs of goods and services are sold by domestic manufacturers to project participants. These factors have a positive impact on economic development and should be the subject of analysis by the state, which can show the best option of spending the investment resources in achieving the desired result, and the best results for a given constraint of investment resources. Therefore, the approach to changes of public investments planning in conditions of lack of public funds is proposed. The limitation of public participation in public-private partnership by implementation mainly initiating and stimulating role is explained. This will require different targets setting for the analysis of socio-economic benefits of projects for pre-project studies and the state funding of pre-project work. The conclusions regarding optimization of the state investment activities and maximization of the foreign investment attraction are made.

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